Test Tube Holder (single dose)

Test tube rack/stand/holder for 50ml Standard Laboratory Conical Centrifuge Tubes.

https://www.amazon.co.uk/gp/product/B07S7CJCDW/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

I used them to hold single coffee doses in freezer as they are cheap and can hold up to 18 - 20g of coffee beans :)